mx.lb.network.bit.nl has no NS records.
NS records for this zone are defined at network.bit.nl.
NS records for this zone are defined at network.bit.nl.
Question and response
Question
dig mx.lb.network.bit.nl. NS
Answer
The response has no answer records.
Authority
network.bit.nl. 600 SOA nsauth1.bit.nl. hostmaster.bit.nl. 2025121201 28800 7200 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0